The High Coercivity Field in Chemically Bonded WSe2/MoSe2 Powder

We studied the magnetic properties of WSe2/MoSe2 powder. The coercivity field reaches 2600 Oe at 5 K, 4233 Oe at 100 K and 1300 Oe at 300 K. These are the highest values reported for two-dimensional transition metal dichalcogenides. This study is different from the widely reported vacancy and zigzag structure-induced ferromagnetism studies. Importantly, a Raman peak red shift was observed, and that supports the chemical bonding at the interface between WSe2 and MoSe2. The large coercivity field originates from the chemical bonding-induced structural distortion at the interface between WSe2 and MoSe2.

Structural study of single Shockley stacking faults terminated near substrate/epilayer interface in 4H-SiC

Structural analysis is carried out of a single Shockley stacking fault (1SSF) that terminates near the substrate/epilayer interface and originally expanded from a basal plane dislocation segment near the epilayer surface of 4H-SiC. The characteristic zigzag structure is found for the partial dislocations (PDs), with microscopic connecting angles of almost 120°. It has been suggested that the microscopic construction of PDs might be limited by the Peierls valley. The termination line near the substrate/epilayer interface was found to have 30° Si-core and 90° Si-core PDs. This combination is the same as that found near the surface of the epilayer in commonly observed 1SSFs. Penetrating BPDs of this kind were also found experimentally for the first time. For the currently proposed charts for the 1SSF expansions, photoluminescence imaging during UV illumination is one of the nondestructive analysis methods that can provide the structural information and expected expansion shapes of the 1SSFs.

The Formation of the Post-Impressionist Trend in the Creative Practice of Oleh Harahonych

The article examines the artistic experience during the period of 1980–2000. Oleh Harahonych’s individual painting style was formed at the turn of the 1960s and 1970s under the influence of a large-scale talent of the famous Ukrainian painter Yosyp Bokshay (1891–1975). O. Harahonych visited Bokshay’s Uzhhorod workshop several years in a row. Having escaped the system-defined academic education, the post-impressionist-to-be was experimenting with the new formal means of reproduction. Being primarily a landscapist, the painter began to develop new dynamic angles of the composition, involving the fragments of a high-altitude highway in presentation of his works, which ensured that his landscapes obtained a sense of modernity. Winding Carpathian roads suggested to the artist a zigzag structure of the composition, which was based on the principles of polar dynamics. In O. Harahonych’s landscapes of the mid‑1980s, the contrast of warm and cold color gradations and intensity of colors enhanced. The dominance of pure colors harmoniously combined with simple shapes that focused on an acute triangle. The renewed lyrical sense of the landscape was reproduced by the simplest artistic means which included decorative ornaments, logic of compositional accents, and clarity of silhouettes. It was realized in a series of plein‑air images of the 2000s. In search of new visual means, Oleh Harahonych’s imagination was ahead of the visual technologies of easel painting of that time. Developed in the 1980s, the author’s style visually resembles the digital presentations in Photoshop. The author’s synthesis of color and form reveals an integral connection between post-impressionism and design, which Roger Fry called “Vision and design” in his book a century ago.

Cantilever Beam Metastructure for Active Broadband Vibration Suppression

This paper presents a beam structure of a new metamaterial-inspired dynamic vibration attenuation system. The proposed experimental research presents a designed cantilevered zigzag structure that can have natural frequencies orders of magnitude lower than a simple cantilever of the same scale. The proposed vibration attenuation system relies on the masses places on the zigzag structure thus changing the dynamic response of the system. The zigzag plates are integrated into the host structure namely a cantilever beam with openings, forming what is referred to here as a metastructure. Experimental frequency response function results are shown comparing the response of the structure to depending on the natural frequency of the zigzag structures. Results show that the distributed inserts in the system can split the peak response of the structure into two separate peaks rendering the peak frequency a low transmission frequency. These preliminary results provide a view of the potential of research work on active-controlled structures and nonlinear insert-structure interaction for vibration attenuation.

Conductive zigzag Pd(iii)–Br chain complex realized by a multiple-hydrogen-bond approach

Coexistence of zigzag structure and the uncommon Pd(iii) oxidation state in quasi-1D halogen-bridged metal complexes was realized in a conductive Br-bridged Pd chain complex, [Pd(dabdOH)2Br]SO4·3H2O (2), for the first time.

Tailoring the facets of Ni3S2 as a bifunctional electrocatalyst for high-performance overall water-splitting

{1̄11} faceted Ni3S2 with an asymmetric zigzag structure is elaborately designed and fabricated, which exhibits remarkable electrocatalytic performance for the HER and OER.